I don't think it's mature enough yet, I really want to add LZ4 to it but I lack the experience in modifying a codec to work in nsis.
The other item I've been thinking about is some sort of file splitting, the obvious size would be 2GB blocks. I would have to add another command to do this, perhaps SetExOutFileBlockSize size, with the basics (2GB, 1GB, 512MB, 256MB). Adding another field to the first header for flags means I could increase the theoretical max size from 8EB to 16EB. I don't know if I'll actually end up doing it though.
"Only a MouseHelmet will save you from a MouseTrap" -Jason Ross (Me)
NSIS 3 POSIX Ninja